Todd Frazier extended his post-derby surge with three more hits on Wednesday, and Mike Leake was solid in what might have been his final start in Cincinnati, leading the Reds to a 9-1 victory in the opening game of a day-night doubleheader.

Frazier won the All-Star Home Run Derby at Great American Ball Park, then went into an 0-for-10 slump. After getting a day off last Sunday, the third...